1285031028 has 48 divisors (see below), whose sum is σ = 3184211520. Its totient is φ = 402200064.

The previous prime is 1285031021. The next prime is 1285031029. The reversal of 1285031028 is 8201305821.

It is a junction number, because it is equal to n+sod(n) for n = 1285030986 and 1285031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285031021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826 + ... + 50702.

It is an arithmetic number, because the mean of its divisors is an integer number (66337740).

Almost surely, 2^1285031028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285031028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1592105760).

1285031028 is an abundant number, since it is smaller than the sum of its proper divisors (1899180492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285031028 is a wasteful number, since it uses less digits than its factorization.

1285031028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50016 (or 50014 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1285031028 is about 35847.3294402805. The cubic root of 1285031028 is about 1087.1877193462.

Adding to 1285031028 its reverse (8201305821), we get a palindrome (9486336849).

The spelling of 1285031028 in words is "one billion, two hundred eighty-five million, thirty-one thousand, twenty-eight".